Do the new parts of the event fully match the ones that are already in the common event? It sounds like maybe your events aren't jumping to the correct label after a new seed is used. It's hard to say for sure without being able to see the events fully but that's the only reason I can think it wouldn't let you jump back to the watering can.
Hey Caz! I was wondering if you could help me out. So when my tomatoes get to the harvest page. (I kept event pages just like your demo) I was wondering if there was a way to make them go back to the stage before. So that way they regrow and players can reharvest. I just cant figure it out. I tried setting the <Self>236 Variable back to the stage ammount before by doing control variable and using the 236 <Self> but didnt seem to work. I also have conditional branches of collected times. 1 it should regrow, if Collected times Equal 2 then it would flip switch b and delete event. Any help would be greatly appreciated!